Riding the subway

I'm an average guy. I'm married I live in a suburb and work in the city.
After working late one night on the subway I watched a couple making out. They were emo and very young. They seemed to enjoy me watching them.
As they started out trying to hide her hand on his cock and his hand around her shoulder and groping her tit. This lead to him slouching and he pulled her down to her head is in his lap now.
She started biting his cock through his pants. His hand had pulled her tit out from her shirt. She had huge tits with very large and dark nipples.
I adjusted my hard on while still watching them.
The lady pulled his cock out. He had a piercing through the head of his cocktail. She started sucking his cock. Her thick lips wrapped around the head of his cock. He groaned and rocked his hips causing more of his cock in her mouth.
She adjusted herself and moved her legs on the bench. He released her tit he was squeezing and his hand grabbed the hem of her miniskirt. He pulled her skirt up showing her fishnet thighs with a black G-string.
I looked around and saw only one other couple at the front of the train car. I pulled my cock from my zipper and I smeared my precum around my head.
The man smirked when he saw my cock and nodded his head in approval.
The man reached and grabbed her g-string and pulled it causing the fabric to separate her hairy pussy lips.
The girl was rocking her hips as he did this. Her head was bobbing up and down on her man's cock.
The man slid his fingers inside her panties and started moving his fingers under the skimpy panties.
The girl moaned loudly and started sucking harder as he groaned in excitement.
I was stroking my cock without care of being seen which was a turn on in its self.
My eyes fixated on the man's hand as his fingers were moving back and forth in quick short strokes.
The bell rang the arrival of the next stop. The man moved his free hand to the girls head and pushed her mouth further down his cock while his fingers worked even faster.
The man grunted as the girl gagged. I watched her face touring red and she tried to pull her mouth off his cock but was unable to as he was much stronger. His fingers moved more like a jerking motion now as he still held her head gagging on his cock. My cock began shooting my cup all over my hand and pants.
As the train jerked to a stop he released her head. She sat up forcing his fingers from her pussy.
She stood and wiped his cum off her lips. She called him an asshole and walked to the double doors.
I was so caught up watching that I didn't care this was my stop too.
I stood and wiped my cum onto my pants leg. I shoved my semihard cock back pants. I inhaled sharply as smiled at how exciting that was and got my mind rscing on how I can find more fun on the subway cars.
When I arrived home. My wife greeted me. I grabbed her and pointed her against the door. I moved my thigh in-between hers. My tongue forced its way between her lips. My tongue lapped at hers while my hands groped her small tits and then down to her hips.
When I released her. She panted and smiled.